After several false starts attemping to drive a 10 segment bargraph with 50mA as brightly as at 100mA by using the supplied voltage more efficiently and running the LEDs in series when possible, this is what I've come up with. I've built a test circuit with four LEDs, tested each possible configurat…

Tri-state Multiplexing

raron March 9, 2011, 6:55pm 2

Nice, but I think you should read up on charlieplexing

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